Burner-heater for boilers.



No. 634,734. Patented Oct. 1,1399.

T. muse. BURNER HEATER FUR BMLERS.

(Application mm in. 19, 1898.)

(No Ilodel.)

E 0000 D 0 O O O 0 0-00 00 M lllll 1 l l-lllullllllrlllll 'of the boiler.

U viTE STATES PATENT OFFICE.

rnnononninausn, or INDIANAPOLIS, INDIANA;

BURNER-HEATE R FO:R BOILERS.

. srncxmcn'rion forming part r Letters Patent No. 634,734, dated October 10, 1399.

To all whom it nuty concern: L Be it known that I, Tnnononn KRUsE, a citizen of the United States,- residing at Indianapolis, in the county of Marion and State of Indiana,have inventednew and useful Improvements in Burner-Heaters for Boilers, of which the following is a specification.

My invention relates to certainnew and useful improvements in boiler-heaters, and is designed particularly for use in connection with kitchen or other domestic boilers, as will be hereinafter more fully set forth, and particularlypointed out in the claims.

The conventional type of boilers for heating water for domestic use is usually of cylindrical form, with the bottom end closed by means of a flanged disk or end, and the lat.- ter is secured to the cylindricalportion of the boiler or shell with its flange turned outwardly, which is the only practical way by which the said end can be riveted to the shell Such boilers are invariably arranged and set in vertical position and heat is usually applied'to them by means of a burner or burners placed underneath the bottom of the said boilers. The heat of the flame thus applied to the base of the boiler. impinges against the exposed and unprotected flange, which soon becomes of ahigher temperature than that of the boiler owing to the distance of the fluid contained in the boiler from thesaid; flange, and the flange thus overheated causes a warping and unequal ex-' pansion ofthe end of the boiler and that por-' tion of its shell connected to and in contact with the exposed and unprotected flange, which unequal expansion causes leakage. 1 This evilis still further aggravated by deposit from the water collected on the interior bottom surface of the bottom of theboiler,

which substance ofitself is a bad conductor of heat and contributes largely to the rapid destruction of the boiler. Many forms of auxiliary waterheaters or boilers have been used in connection with boilers of this class by means ofwhich the water is heated before being admitted into the boiler; but these have in practice been proven to be unsatisfactory owing to the accumulationof deposit or lime in them when hard or mineral water consti-i tutes the source of water-supply and which Application filed mainta aises. Serial 1a. 696,952. (No model.)

deposit 'soon clogs up said auxiliary heaters and renders them useless as a water-heater. The object of this my invention is to pro= vide a means for applying heat directly to such vertical and cylindrial boilers in such a manner and at a distance from the base there of to not in juriously affect the said base and to avoid an unequal expansion of the same and the shell of the boiler;' also, to provide a burner-heater by means of which the heat produced will be effectually applied and the consumption of the fuel inproportion to the heat produced will be economized; also, to construct a burner-heaterthat will be simple, durable,- cheap, and effective. 1 I attain these objects by means of theburner-heater illusvtrated in the accompanying drawings, in which similar numerals of reference designate like parts throughout the several views.

Figure 1 is a broken sectional elevational view of my invention of a burner-heater applied to the conventional kitchen or domestic water-heating boiler and taken through the line A B. (See Fig. 2.) Fig.2 is a sectional O D. (See Fig. 1.) Fig. 3 is a detail plan sectional view of the burner-heater, taken through the lineiE IR; (See Figs. 1 and 4.) Fig. 4 is a detail elevational view of the burner-heater, looking in the direction of the arrow a. (See Fig. 3.) Fig. 5 is a'rdetail view of theim perforated gas deflector anddistributer whichis placed within the burner. Fig. 6 is an enlarged broken detail sectional view of the burner-chamber'and burner and taken through the line G H. (SeeFigs. 2, 3, and 4:.) i The boiler l, in which Water is heated for domestic purposes, is of the usual conventional type of cylindrical vertical water -heating boiler, the base or bottomend 2 of which is flanged to be riveted tothe bottom edge of the shell portion of the boilerto form the downwardly-projecting flange-j oint 3, and it is this joint portion of this class of boiler that first corrodes and wears out, which action results from the manner of applying heat to the base causes the fiameto impinge against the exposed flange 3 and soon overheats the same on account of its-not being in direct contact plan view of the same, taken through the line IOO with the water contained in the boiler 1, and in order to avoid this evil I employ my invention of a heater-burner to directly heat the water in the boiler and which burner is adapted to be applied to the sides of the boiler abo we the base thereof and above the top I limit or boundary line that the accumulation of deposit in the boilermay reach. I will now proceed to describe the construction of my heater-burner and the manner of applying the same.

The burner-heater may be considered'as composed of two main chambers or compartmentsa lower fire-compartment andan uppercombustion-compartmentboth of which compartments, are made semicircular in form to be applied to the sides of a cylindrical 7 provided with the burner or combustion perforations 5, through which the fuelgas escapes and at which perforations the combustion of the fuel takes place. I I

The back 6 of the heater issemicircular in form in plan view and is concentric with the inner peripheral surface of the burner, which latter is semicircular inform to conform with the boiler to which the latter is applied, and the said back is formed integral with the burner and forms the rear closing wall of the latter and extends vertically beneath and above the bottom and top sides of said burner 4: to form a fire compartment or chamber 7 of suitable capacity for the proper combustion of the fuel. The lower flange 8 of the fire compartment or chamber is formed integral on the inner bottom end of the back 6 and extends inwardly toward the boiler a distance sufficient to permit a slight opening or base air space or inlet between its edge and the shell of the boiler 1. The upper flange 10 is formed integral on the top edge of the back 6, and it may be formed to extend inwardly and normally to the interior surface of the face of the back 6;- but I prefer said flange 10 to be constructed to extend inwardly and to incline upwardly in order to obtain sufficient top airspace in which to permit a proper and free circulation of the air at the points of combustion to accelerate and assist the latter.

bustion in lieu of the serrated flange.

ive and economical application of the heat of the flame from the burner 4. End closure and distance walls 13 are formed integral with the semicircular bacli portion of the burnerheater and extend vertically along each side thereof and are provided for the purpose of closing the ends of the heater and burner chambers and the burner 4, and the said end closure-walls 18 havetheirinneredges 1t adapted to rest or fit against the convex or cylindrical surface of the shell of the boiler to which the heater-burner is applied, thereby completely inclosing the heating-surface of the boiler, and to which fire-chamber thus formed air for the support of combustion can only enter at the bottom air-space 9 and exit at the top space 15, through which latter space the products of com bustion'are dis charged. A top flange 16', having serrated inner edges, is formed integral on the top edge of the wall 12 of the combustion-chamber and extendsinwardly to permit the points of the said serrations to contactwith the shell of the boiler 1, and the said form of flange is provided for the purpose of preventing the too rapid discharge or upward flow of the heated gases from and out of the combustionchamber and to conduce to more economical application of the heat to'the boiler. The' said flange 16 may be constructedwithout the serrations and adapted to fit closely to the boiler-surface, and a flue orpipe, as shown in dotted lines in Figs. 1 and 4, may be provided for carrying off the products of com- Asbestos or such other suitable heat non-con ducting or refractory material or lining 17 is employed to line the combustion-chamber 7 and is provided for the purpose of protecting the walls of the heater from being overheated and becoming warped or distorted.

A hollow elbow 18 is formed integral on the back 6 of the heater-burner and connects with the burner 4, and to this elbow is connected the gas-supply pipe, which is done in the usual manner, one method of which is shown in Figs. 1 and 4, in which the nipples 19 are screwed into the elbows 18 and the elbows 20 screwed on the ends of the nipples 19, the nipples 21 screwed into the elbows 20, and the air-andgas-mixing devices, which may be of any suitable form of construction, as 22, are connected to the nipples 21 and the gas-supply pipes 23, which connections complete the system of connection.

In the interior of the burner is placed to extend longitudinally therein the imperforated deflecting and distributing plate 24., which is provided for the purpose of distributing equally the supply of fuel-gas as it enters the burner 4 to the combustion-perforations 5 thereof.

I do not confine myself to the particular semicircular form of the burner described nor to the number of burner-heaters that may i be applied, as one or more may be employed in connection with a boiler, the numberof which is regulated to the capacity and size of the boiler and the quantity of water to be heated in a given time. In order to still further increase the heating capacity of the heater, the ends of the same may be constructed to abut the ends of the next adjacent burner, as shown in dotted lines in Fig. 2. It will be readily seen after an examination of the drawings, particularly Fig. 4, that the heat applied to the boiler l, as previously set ed to heat, and a gas-burner having a perforated combustion side and burner extending within the lower part of the casing, substantially as set forth.

2. In a burner-heater for boilers, a casing having an open fire-exposing face directed toward the side of the boiler, a gas-burner extending within the lower part of the casing, and a flange projecting inwardly, at the base of the casing to partially close the air-inlet thereof, substantially as set forth.

3. In a burner-heater for boilers, the com-- bination with a casing having closed ends and sides, to form a combustion-chamber with fire-exposing face directed toward the boiler with which it is designed to enact, a gas burner extending along the lower interior part of the casing, thesaid burner having a perforated combustion side, as described, and

an inwardly-extending serrated flange, the points or ends of the serrations adapted to contact with the side of the boiler, as set forth.

4. In a burner-heater for, boilers, the combination of a casing having closed ends and sides and an open fire exposing face at that side which is designed to coact with the boiler, a gas-burner located in the lower part of the chamber and extending along same, and'having a perforated combustion side, an inwardly-extending serrated flange at the top of the heater so that the points of the serra' tions contact with the boiler; and a lower flange, extending inwardly, but not contacting with the boiler, as set forth. I

In testimony whereof I have hereunto, set

my hand in the presence of two subscribing witnesses.

, THEODORE KRUSE. Witnesses:

THoMrsoN R. BELL, WILLIAM W. HOLLAND. 

